/***** BEGIN LICENSE BLOCK *****
 * Version: EPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Eclipse Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/epl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2006 Ola Bini <ola@ologix.com>
 * 
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * decision by deleting the provisions above and replace them with the notice
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 ***** END LICENSE BLOCK *****/
/**
 * $Id$
 */
package org.jruby.util;

import java.io.File;
import java.io.FileFilter;
import java.io.FilenameFilter;
import java.io.IOException;

import org.jruby.Ruby;

import jnr.posix.JavaSecuredFile;
import org.jruby.platform.Platform;

/**
 * <p>This file acts as an alternative to NormalizedFile, due to the problems with current working 
 * directory.</p>
 *
 */
public class JRubyFile extends JavaSecuredFile implements FileResource {
    private static final long serialVersionUID = 435364547567567L;

    public static JRubyFile create(String cwd, String pathname) {
        return createNoUnicodeConversion(cwd, pathname);
    }

    public static FileResource createResource(String cwd, String pathname) {
      if (pathname.indexOf('!') > 0) {
        return JarFileResource.load(pathname);
      } else {
        // Regular file is fine
        return create(cwd, pathname);
      }
    }

    public static String normalizeSeps(String path) {
        if (Platform.IS_WINDOWS) {
            return path.replace(File.separatorChar, '/');
        } else {
            return path;
        }
    }

    private static JRubyFile createNoUnicodeConversion(String cwd, String pathname) {
        if (pathname == null || pathname.equals("") || Ruby.isSecurityRestricted()) {
            return JRubyNonExistentFile.NOT_EXIST;
        }
        File internal = new JavaSecuredFile(pathname);
        if(!internal.isAbsolute()) {
            internal = new JavaSecuredFile(cwd, pathname);
            if(!internal.isAbsolute()) {
                throw new IllegalArgumentException("Neither current working directory ("+cwd+") nor pathname ("+pathname+") led to an absolute path");
            }
        }
        return new JRubyFile(internal);
    }

    public static String getFileProperty(String property) {
        return normalizeSeps(SafePropertyAccessor.getProperty(property, "/"));
    }

    private JRubyFile(File file) {
        this(file.getAbsolutePath());
    }

    protected JRubyFile(String filename) {
        super(filename);
    }

    @Override
    public String getAbsolutePath() {
        return normalizeSeps(new File(super.getPath()).getAbsolutePath());
    }

    @Override
    public String getCanonicalPath() throws IOException {
        try {
            return normalizeSeps(super.getCanonicalPath());
        } catch (IOException e) {
            // usually IOExceptions don't tell us anything about the path,
            // so add an extra wrapper to give more debugging help.
            throw (IOException) new IOException("Unable to canonicalize path: " + getAbsolutePath()).initCause(e);
        }
    }

    @Override
    public String getPath() {
        return normalizeSeps(super.getPath());
    }

    @Override
    public String toString() {
        return normalizeSeps(super.toString());
    }

    @Override
    public File getAbsoluteFile() {
        return new JRubyFile(getAbsolutePath());
    }

    @Override
    public File getCanonicalFile() throws IOException {
        return new JRubyFile(getCanonicalPath());
    }

    @Override
    public String getParent() {
        String par = super.getParent();
        if (par != null) {
            par = normalizeSeps(par);
        }
        return par;
    }

    @Override
    public File getParentFile() {
        String par = getParent();
        if (par == null) {
            return this;
        } else {
            return new JRubyFile(par);
        }
    }
    
    public static File[] listRoots() {
        File[] roots = File.listRoots();
        JRubyFile[] smartRoots = new JRubyFile[roots.length];
        for(int i = 0, j = roots.length; i < j; i++) {
            smartRoots[i] = new JRubyFile(roots[i].getPath());
        }
        return smartRoots;
    }
    
    public static File createTempFile(String prefix, String suffix, File directory) throws IOException {
        return new JRubyFile(File.createTempFile(prefix, suffix,directory));
    }
    
    public static File createTempFile(String prefix, String suffix) throws IOException {
        return new JRubyFile(File.createTempFile(prefix, suffix));
    }

    @Override
    public String[] list(FilenameFilter filter) {
        String[] files = super.list(filter);
        if (files == null) {
            return null;
        }
        
        String[] smartFiles = new String[files.length];
        for (int i = 0; i < files.length; i++) {
            smartFiles[i] = normalizeSeps(files[i]);
        }
        return smartFiles;
    }

    @Override
    public File[] listFiles() {
        File[] files = super.listFiles();
        if (files == null) {
            return null;
        }
        
        JRubyFile[] smartFiles = new JRubyFile[files.length];
        for (int i = 0, j = files.length; i < j; i++) {
            smartFiles[i] = createNoUnicodeConversion(super.getAbsolutePath(), files[i].getPath());
        }
        return smartFiles;
    }

    @Override
    public File[] listFiles(final FileFilter filter) {
        final File[] files = super.listFiles(filter);
        if (files == null) {
            return null;
        }
        
        JRubyFile[] smartFiles = new JRubyFile[files.length];
        for (int i = 0,j = files.length; i < j; i++) {
            smartFiles[i] = createNoUnicodeConversion(super.getAbsolutePath(), files[i].getPath());
        }
        return smartFiles;
    }

    @Override
    public File[] listFiles(final FilenameFilter filter) {
        final File[] files = super.listFiles(filter);
        if (files == null) {
            return null;
        }
        
        JRubyFile[] smartFiles = new JRubyFile[files.length];
        for (int i = 0,j = files.length; i < j; i++) {
            smartFiles[i] = createNoUnicodeConversion(super.getAbsolutePath(), files[i].getPath());
        }
        return smartFiles;
    }
}
